Commit | Line | Data |
---|---|---|
ca4d147e HP |
1 | /* |
2 | * linux/fs/ocfs2/ioctl.c | |
3 | * | |
4 | * Copyright (C) 2006 Herbert Poetzl | |
5 | * adapted from Remy Card's ext2/ioctl.c | |
6 | */ | |
7 | ||
8 | #include <linux/fs.h> | |
9 | #include <linux/mount.h> | |
34e6c59a | 10 | #include <linux/compat.h> |
ca4d147e | 11 | |
ca4d147e HP |
12 | #include <cluster/masklog.h> |
13 | ||
14 | #include "ocfs2.h" | |
15 | #include "alloc.h" | |
16 | #include "dlmglue.h" | |
b2580103 | 17 | #include "file.h" |
ca4d147e HP |
18 | #include "inode.h" |
19 | #include "journal.h" | |
20 | ||
21 | #include "ocfs2_fs.h" | |
2d562518 | 22 | #include "ioctl.h" |
d659072f | 23 | #include "resize.h" |
bd50873d | 24 | #include "refcounttree.h" |
3e5db17d TY |
25 | #include "sysfile.h" |
26 | #include "dir.h" | |
27 | #include "buffer_head_io.h" | |
d24a10b9 | 28 | #include "suballoc.h" |
53069d4e | 29 | #include "move_extents.h" |
2d562518 | 30 | |
ca4d147e HP |
31 | #include <linux/ext2_fs.h> |
32 | ||
ddee5cdb TY |
33 | #define o2info_from_user(a, b) \ |
34 | copy_from_user(&(a), (b), sizeof(a)) | |
35 | #define o2info_to_user(a, b) \ | |
36 | copy_to_user((typeof(a) __user *)b, &(a), sizeof(a)) | |
37 | ||
38 | /* | |
39 | * This call is void because we are already reporting an error that may | |
40 | * be -EFAULT. The error will be returned from the ioctl(2) call. It's | |
41 | * just a best-effort to tell userspace that this request caused the error. | |
42 | */ | |
8aa1fa36 | 43 | static inline void o2info_set_request_error(struct ocfs2_info_request *kreq, |
ddee5cdb TY |
44 | struct ocfs2_info_request __user *req) |
45 | { | |
46 | kreq->ir_flags |= OCFS2_INFO_FL_ERROR; | |
47 | (void)put_user(kreq->ir_flags, (__u32 __user *)&(req->ir_flags)); | |
48 | } | |
49 | ||
8aa1fa36 | 50 | static inline void o2info_set_request_filled(struct ocfs2_info_request *req) |
1936a267 TY |
51 | { |
52 | req->ir_flags |= OCFS2_INFO_FL_FILLED; | |
53 | } | |
54 | ||
8aa1fa36 | 55 | static inline void o2info_clear_request_filled(struct ocfs2_info_request *req) |
1936a267 TY |
56 | { |
57 | req->ir_flags &= ~OCFS2_INFO_FL_FILLED; | |
58 | } | |
59 | ||
3e5db17d TY |
60 | static inline int o2info_coherent(struct ocfs2_info_request *req) |
61 | { | |
62 | return (!(req->ir_flags & OCFS2_INFO_FL_NON_COHERENT)); | |
63 | } | |
1936a267 | 64 | |
ca4d147e HP |
65 | static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags) |
66 | { | |
67 | int status; | |
68 | ||
e63aecb6 | 69 | status = ocfs2_inode_lock(inode, NULL, 0); |
ca4d147e HP |
70 | if (status < 0) { |
71 | mlog_errno(status); | |
72 | return status; | |
73 | } | |
6e4b0d56 | 74 | ocfs2_get_inode_flags(OCFS2_I(inode)); |
ca4d147e | 75 | *flags = OCFS2_I(inode)->ip_attr; |
e63aecb6 | 76 | ocfs2_inode_unlock(inode, 0); |
ca4d147e | 77 | |
ca4d147e HP |
78 | return status; |
79 | } | |
80 | ||
81 | static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags, | |
82 | unsigned mask) | |
83 | { | |
84 | struct ocfs2_inode_info *ocfs2_inode = OCFS2_I(inode); | |
85 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1fabe148 | 86 | handle_t *handle = NULL; |
ca4d147e HP |
87 | struct buffer_head *bh = NULL; |
88 | unsigned oldflags; | |
89 | int status; | |
90 | ||
91 | mutex_lock(&inode->i_mutex); | |
92 | ||
e63aecb6 | 93 | status = ocfs2_inode_lock(inode, &bh, 1); |
ca4d147e HP |
94 | if (status < 0) { |
95 | mlog_errno(status); | |
96 | goto bail; | |
97 | } | |
98 | ||
ca4d147e | 99 | status = -EACCES; |
2e149670 | 100 | if (!inode_owner_or_capable(inode)) |
ca4d147e HP |
101 | goto bail_unlock; |
102 | ||
103 | if (!S_ISDIR(inode->i_mode)) | |
104 | flags &= ~OCFS2_DIRSYNC_FL; | |
105 | ||
65eff9cc | 106 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); |
ca4d147e HP |
107 | if (IS_ERR(handle)) { |
108 | status = PTR_ERR(handle); | |
109 | mlog_errno(status); | |
110 | goto bail_unlock; | |
111 | } | |
112 | ||
113 | oldflags = ocfs2_inode->ip_attr; | |
114 | flags = flags & mask; | |
115 | flags |= oldflags & ~mask; | |
116 | ||
117 | /* | |
118 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
119 | * the relevant capability. | |
120 | */ | |
121 | status = -EPERM; | |
122 | if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) & | |
123 | (OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) { | |
124 | if (!capable(CAP_LINUX_IMMUTABLE)) | |
b8a0ae57 | 125 | goto bail_commit; |
ca4d147e HP |
126 | } |
127 | ||
128 | ocfs2_inode->ip_attr = flags; | |
129 | ocfs2_set_inode_flags(inode); | |
130 | ||
131 | status = ocfs2_mark_inode_dirty(handle, inode, bh); | |
132 | if (status < 0) | |
133 | mlog_errno(status); | |
134 | ||
b8a0ae57 | 135 | bail_commit: |
02dc1af4 | 136 | ocfs2_commit_trans(osb, handle); |
ca4d147e | 137 | bail_unlock: |
e63aecb6 | 138 | ocfs2_inode_unlock(inode, 1); |
ca4d147e HP |
139 | bail: |
140 | mutex_unlock(&inode->i_mutex); | |
141 | ||
a81cb88b | 142 | brelse(bh); |
ca4d147e | 143 | |
ca4d147e HP |
144 | return status; |
145 | } | |
146 | ||
ddee5cdb TY |
147 | int ocfs2_info_handle_blocksize(struct inode *inode, |
148 | struct ocfs2_info_request __user *req) | |
149 | { | |
150 | int status = -EFAULT; | |
151 | struct ocfs2_info_blocksize oib; | |
152 | ||
153 | if (o2info_from_user(oib, req)) | |
154 | goto bail; | |
155 | ||
156 | oib.ib_blocksize = inode->i_sb->s_blocksize; | |
1936a267 | 157 | |
8aa1fa36 | 158 | o2info_set_request_filled(&oib.ib_req); |
ddee5cdb TY |
159 | |
160 | if (o2info_to_user(oib, req)) | |
161 | goto bail; | |
162 | ||
163 | status = 0; | |
164 | bail: | |
165 | if (status) | |
8aa1fa36 | 166 | o2info_set_request_error(&oib.ib_req, req); |
ddee5cdb TY |
167 | |
168 | return status; | |
169 | } | |
170 | ||
171 | int ocfs2_info_handle_clustersize(struct inode *inode, | |
172 | struct ocfs2_info_request __user *req) | |
173 | { | |
174 | int status = -EFAULT; | |
175 | struct ocfs2_info_clustersize oic; | |
176 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
177 | ||
178 | if (o2info_from_user(oic, req)) | |
179 | goto bail; | |
180 | ||
181 | oic.ic_clustersize = osb->s_clustersize; | |
1936a267 | 182 | |
8aa1fa36 | 183 | o2info_set_request_filled(&oic.ic_req); |
ddee5cdb TY |
184 | |
185 | if (o2info_to_user(oic, req)) | |
186 | goto bail; | |
187 | ||
188 | status = 0; | |
189 | bail: | |
190 | if (status) | |
8aa1fa36 | 191 | o2info_set_request_error(&oic.ic_req, req); |
ddee5cdb TY |
192 | |
193 | return status; | |
194 | } | |
195 | ||
196 | int ocfs2_info_handle_maxslots(struct inode *inode, | |
197 | struct ocfs2_info_request __user *req) | |
198 | { | |
199 | int status = -EFAULT; | |
200 | struct ocfs2_info_maxslots oim; | |
201 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
202 | ||
203 | if (o2info_from_user(oim, req)) | |
204 | goto bail; | |
205 | ||
206 | oim.im_max_slots = osb->max_slots; | |
1936a267 | 207 | |
8aa1fa36 | 208 | o2info_set_request_filled(&oim.im_req); |
ddee5cdb TY |
209 | |
210 | if (o2info_to_user(oim, req)) | |
211 | goto bail; | |
212 | ||
213 | status = 0; | |
214 | bail: | |
215 | if (status) | |
8aa1fa36 | 216 | o2info_set_request_error(&oim.im_req, req); |
ddee5cdb TY |
217 | |
218 | return status; | |
219 | } | |
220 | ||
221 | int ocfs2_info_handle_label(struct inode *inode, | |
222 | struct ocfs2_info_request __user *req) | |
223 | { | |
224 | int status = -EFAULT; | |
225 | struct ocfs2_info_label oil; | |
226 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
227 | ||
228 | if (o2info_from_user(oil, req)) | |
229 | goto bail; | |
230 | ||
231 | memcpy(oil.il_label, osb->vol_label, OCFS2_MAX_VOL_LABEL_LEN); | |
1936a267 | 232 | |
8aa1fa36 | 233 | o2info_set_request_filled(&oil.il_req); |
ddee5cdb TY |
234 | |
235 | if (o2info_to_user(oil, req)) | |
236 | goto bail; | |
237 | ||
238 | status = 0; | |
239 | bail: | |
240 | if (status) | |
8aa1fa36 | 241 | o2info_set_request_error(&oil.il_req, req); |
ddee5cdb TY |
242 | |
243 | return status; | |
244 | } | |
245 | ||
246 | int ocfs2_info_handle_uuid(struct inode *inode, | |
247 | struct ocfs2_info_request __user *req) | |
248 | { | |
249 | int status = -EFAULT; | |
250 | struct ocfs2_info_uuid oiu; | |
251 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
252 | ||
253 | if (o2info_from_user(oiu, req)) | |
254 | goto bail; | |
255 | ||
256 | memcpy(oiu.iu_uuid_str, osb->uuid_str, OCFS2_TEXT_UUID_LEN + 1); | |
1936a267 | 257 | |
8aa1fa36 | 258 | o2info_set_request_filled(&oiu.iu_req); |
ddee5cdb TY |
259 | |
260 | if (o2info_to_user(oiu, req)) | |
261 | goto bail; | |
262 | ||
263 | status = 0; | |
264 | bail: | |
265 | if (status) | |
8aa1fa36 | 266 | o2info_set_request_error(&oiu.iu_req, req); |
ddee5cdb TY |
267 | |
268 | return status; | |
269 | } | |
270 | ||
271 | int ocfs2_info_handle_fs_features(struct inode *inode, | |
272 | struct ocfs2_info_request __user *req) | |
273 | { | |
274 | int status = -EFAULT; | |
275 | struct ocfs2_info_fs_features oif; | |
276 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
277 | ||
278 | if (o2info_from_user(oif, req)) | |
279 | goto bail; | |
280 | ||
281 | oif.if_compat_features = osb->s_feature_compat; | |
282 | oif.if_incompat_features = osb->s_feature_incompat; | |
283 | oif.if_ro_compat_features = osb->s_feature_ro_compat; | |
1936a267 | 284 | |
8aa1fa36 | 285 | o2info_set_request_filled(&oif.if_req); |
ddee5cdb TY |
286 | |
287 | if (o2info_to_user(oif, req)) | |
288 | goto bail; | |
289 | ||
290 | status = 0; | |
291 | bail: | |
292 | if (status) | |
8aa1fa36 | 293 | o2info_set_request_error(&oif.if_req, req); |
ddee5cdb TY |
294 | |
295 | return status; | |
296 | } | |
297 | ||
298 | int ocfs2_info_handle_journal_size(struct inode *inode, | |
299 | struct ocfs2_info_request __user *req) | |
300 | { | |
301 | int status = -EFAULT; | |
302 | struct ocfs2_info_journal_size oij; | |
303 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
304 | ||
305 | if (o2info_from_user(oij, req)) | |
306 | goto bail; | |
307 | ||
308 | oij.ij_journal_size = osb->journal->j_inode->i_size; | |
309 | ||
8aa1fa36 | 310 | o2info_set_request_filled(&oij.ij_req); |
ddee5cdb TY |
311 | |
312 | if (o2info_to_user(oij, req)) | |
313 | goto bail; | |
314 | ||
315 | status = 0; | |
316 | bail: | |
317 | if (status) | |
8aa1fa36 | 318 | o2info_set_request_error(&oij.ij_req, req); |
ddee5cdb TY |
319 | |
320 | return status; | |
321 | } | |
322 | ||
3e5db17d TY |
323 | int ocfs2_info_scan_inode_alloc(struct ocfs2_super *osb, |
324 | struct inode *inode_alloc, u64 blkno, | |
325 | struct ocfs2_info_freeinode *fi, u32 slot) | |
326 | { | |
327 | int status = 0, unlock = 0; | |
328 | ||
329 | struct buffer_head *bh = NULL; | |
330 | struct ocfs2_dinode *dinode_alloc = NULL; | |
331 | ||
332 | if (inode_alloc) | |
333 | mutex_lock(&inode_alloc->i_mutex); | |
334 | ||
335 | if (o2info_coherent(&fi->ifi_req)) { | |
336 | status = ocfs2_inode_lock(inode_alloc, &bh, 0); | |
337 | if (status < 0) { | |
338 | mlog_errno(status); | |
339 | goto bail; | |
340 | } | |
341 | unlock = 1; | |
342 | } else { | |
343 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
344 | if (status < 0) { | |
345 | mlog_errno(status); | |
346 | goto bail; | |
347 | } | |
348 | } | |
349 | ||
350 | dinode_alloc = (struct ocfs2_dinode *)bh->b_data; | |
351 | ||
352 | fi->ifi_stat[slot].lfi_total = | |
353 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_total); | |
354 | fi->ifi_stat[slot].lfi_free = | |
355 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_total) - | |
356 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_used); | |
357 | ||
358 | bail: | |
359 | if (unlock) | |
360 | ocfs2_inode_unlock(inode_alloc, 0); | |
361 | ||
362 | if (inode_alloc) | |
363 | mutex_unlock(&inode_alloc->i_mutex); | |
364 | ||
365 | brelse(bh); | |
366 | ||
367 | return status; | |
368 | } | |
369 | ||
370 | int ocfs2_info_handle_freeinode(struct inode *inode, | |
371 | struct ocfs2_info_request __user *req) | |
372 | { | |
373 | u32 i; | |
374 | u64 blkno = -1; | |
375 | char namebuf[40]; | |
376 | int status = -EFAULT, type = INODE_ALLOC_SYSTEM_INODE; | |
377 | struct ocfs2_info_freeinode *oifi = NULL; | |
378 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
379 | struct inode *inode_alloc = NULL; | |
380 | ||
381 | oifi = kzalloc(sizeof(struct ocfs2_info_freeinode), GFP_KERNEL); | |
382 | if (!oifi) { | |
383 | status = -ENOMEM; | |
384 | mlog_errno(status); | |
87f0d5c8 | 385 | goto out_err; |
3e5db17d TY |
386 | } |
387 | ||
388 | if (o2info_from_user(*oifi, req)) | |
389 | goto bail; | |
390 | ||
391 | oifi->ifi_slotnum = osb->max_slots; | |
392 | ||
393 | for (i = 0; i < oifi->ifi_slotnum; i++) { | |
394 | if (o2info_coherent(&oifi->ifi_req)) { | |
395 | inode_alloc = ocfs2_get_system_file_inode(osb, type, i); | |
396 | if (!inode_alloc) { | |
397 | mlog(ML_ERROR, "unable to get alloc inode in " | |
398 | "slot %u\n", i); | |
399 | status = -EIO; | |
400 | goto bail; | |
401 | } | |
402 | } else { | |
403 | ocfs2_sprintf_system_inode_name(namebuf, | |
404 | sizeof(namebuf), | |
405 | type, i); | |
406 | status = ocfs2_lookup_ino_from_name(osb->sys_root_inode, | |
407 | namebuf, | |
408 | strlen(namebuf), | |
409 | &blkno); | |
410 | if (status < 0) { | |
411 | status = -ENOENT; | |
412 | goto bail; | |
413 | } | |
414 | } | |
415 | ||
416 | status = ocfs2_info_scan_inode_alloc(osb, inode_alloc, blkno, oifi, i); | |
417 | if (status < 0) | |
418 | goto bail; | |
419 | ||
420 | iput(inode_alloc); | |
421 | inode_alloc = NULL; | |
422 | } | |
423 | ||
424 | o2info_set_request_filled(&oifi->ifi_req); | |
425 | ||
426 | if (o2info_to_user(*oifi, req)) | |
427 | goto bail; | |
428 | ||
429 | status = 0; | |
430 | bail: | |
431 | if (status) | |
432 | o2info_set_request_error(&oifi->ifi_req, req); | |
433 | ||
434 | kfree(oifi); | |
87f0d5c8 | 435 | out_err: |
3e5db17d TY |
436 | return status; |
437 | } | |
438 | ||
d24a10b9 TY |
439 | static void o2ffg_update_histogram(struct ocfs2_info_free_chunk_list *hist, |
440 | unsigned int chunksize) | |
441 | { | |
442 | int index; | |
443 | ||
444 | index = __ilog2_u32(chunksize); | |
445 | if (index >= OCFS2_INFO_MAX_HIST) | |
446 | index = OCFS2_INFO_MAX_HIST - 1; | |
447 | ||
448 | hist->fc_chunks[index]++; | |
449 | hist->fc_clusters[index] += chunksize; | |
450 | } | |
451 | ||
452 | static void o2ffg_update_stats(struct ocfs2_info_freefrag_stats *stats, | |
453 | unsigned int chunksize) | |
454 | { | |
455 | if (chunksize > stats->ffs_max) | |
456 | stats->ffs_max = chunksize; | |
457 | ||
458 | if (chunksize < stats->ffs_min) | |
459 | stats->ffs_min = chunksize; | |
460 | ||
461 | stats->ffs_avg += chunksize; | |
462 | stats->ffs_free_chunks_real++; | |
463 | } | |
464 | ||
465 | void ocfs2_info_update_ffg(struct ocfs2_info_freefrag *ffg, | |
466 | unsigned int chunksize) | |
467 | { | |
468 | o2ffg_update_histogram(&(ffg->iff_ffs.ffs_fc_hist), chunksize); | |
469 | o2ffg_update_stats(&(ffg->iff_ffs), chunksize); | |
470 | } | |
471 | ||
472 | int ocfs2_info_freefrag_scan_chain(struct ocfs2_super *osb, | |
473 | struct inode *gb_inode, | |
474 | struct ocfs2_dinode *gb_dinode, | |
475 | struct ocfs2_chain_rec *rec, | |
476 | struct ocfs2_info_freefrag *ffg, | |
477 | u32 chunks_in_group) | |
478 | { | |
479 | int status = 0, used; | |
480 | u64 blkno; | |
481 | ||
482 | struct buffer_head *bh = NULL; | |
483 | struct ocfs2_group_desc *bg = NULL; | |
484 | ||
485 | unsigned int max_bits, num_clusters; | |
486 | unsigned int offset = 0, cluster, chunk; | |
487 | unsigned int chunk_free, last_chunksize = 0; | |
488 | ||
489 | if (!le32_to_cpu(rec->c_free)) | |
490 | goto bail; | |
491 | ||
492 | do { | |
493 | if (!bg) | |
494 | blkno = le64_to_cpu(rec->c_blkno); | |
495 | else | |
496 | blkno = le64_to_cpu(bg->bg_next_group); | |
497 | ||
498 | if (bh) { | |
499 | brelse(bh); | |
500 | bh = NULL; | |
501 | } | |
502 | ||
503 | if (o2info_coherent(&ffg->iff_req)) | |
504 | status = ocfs2_read_group_descriptor(gb_inode, | |
505 | gb_dinode, | |
506 | blkno, &bh); | |
507 | else | |
508 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
509 | ||
510 | if (status < 0) { | |
511 | mlog(ML_ERROR, "Can't read the group descriptor # " | |
512 | "%llu from device.", (unsigned long long)blkno); | |
513 | status = -EIO; | |
514 | goto bail; | |
515 | } | |
516 | ||
517 | bg = (struct ocfs2_group_desc *)bh->b_data; | |
518 | ||
519 | if (!le16_to_cpu(bg->bg_free_bits_count)) | |
520 | continue; | |
521 | ||
522 | max_bits = le16_to_cpu(bg->bg_bits); | |
523 | offset = 0; | |
524 | ||
525 | for (chunk = 0; chunk < chunks_in_group; chunk++) { | |
526 | /* | |
527 | * last chunk may be not an entire one. | |
528 | */ | |
529 | if ((offset + ffg->iff_chunksize) > max_bits) | |
530 | num_clusters = max_bits - offset; | |
531 | else | |
532 | num_clusters = ffg->iff_chunksize; | |
533 | ||
534 | chunk_free = 0; | |
535 | for (cluster = 0; cluster < num_clusters; cluster++) { | |
536 | used = ocfs2_test_bit(offset, | |
537 | (unsigned long *)bg->bg_bitmap); | |
538 | /* | |
539 | * - chunk_free counts free clusters in #N chunk. | |
540 | * - last_chunksize records the size(in) clusters | |
541 | * for the last real free chunk being counted. | |
542 | */ | |
543 | if (!used) { | |
544 | last_chunksize++; | |
545 | chunk_free++; | |
546 | } | |
547 | ||
548 | if (used && last_chunksize) { | |
549 | ocfs2_info_update_ffg(ffg, | |
550 | last_chunksize); | |
551 | last_chunksize = 0; | |
552 | } | |
553 | ||
554 | offset++; | |
555 | } | |
556 | ||
557 | if (chunk_free == ffg->iff_chunksize) | |
558 | ffg->iff_ffs.ffs_free_chunks++; | |
559 | } | |
560 | ||
561 | /* | |
562 | * need to update the info for last free chunk. | |
563 | */ | |
564 | if (last_chunksize) | |
565 | ocfs2_info_update_ffg(ffg, last_chunksize); | |
566 | ||
567 | } while (le64_to_cpu(bg->bg_next_group)); | |
568 | ||
569 | bail: | |
570 | brelse(bh); | |
571 | ||
572 | return status; | |
573 | } | |
574 | ||
575 | int ocfs2_info_freefrag_scan_bitmap(struct ocfs2_super *osb, | |
576 | struct inode *gb_inode, u64 blkno, | |
577 | struct ocfs2_info_freefrag *ffg) | |
578 | { | |
579 | u32 chunks_in_group; | |
580 | int status = 0, unlock = 0, i; | |
581 | ||
582 | struct buffer_head *bh = NULL; | |
583 | struct ocfs2_chain_list *cl = NULL; | |
584 | struct ocfs2_chain_rec *rec = NULL; | |
585 | struct ocfs2_dinode *gb_dinode = NULL; | |
586 | ||
587 | if (gb_inode) | |
588 | mutex_lock(&gb_inode->i_mutex); | |
589 | ||
590 | if (o2info_coherent(&ffg->iff_req)) { | |
591 | status = ocfs2_inode_lock(gb_inode, &bh, 0); | |
592 | if (status < 0) { | |
593 | mlog_errno(status); | |
594 | goto bail; | |
595 | } | |
596 | unlock = 1; | |
597 | } else { | |
598 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
599 | if (status < 0) { | |
600 | mlog_errno(status); | |
601 | goto bail; | |
602 | } | |
603 | } | |
604 | ||
605 | gb_dinode = (struct ocfs2_dinode *)bh->b_data; | |
606 | cl = &(gb_dinode->id2.i_chain); | |
607 | ||
608 | /* | |
609 | * Chunksize(in) clusters from userspace should be | |
610 | * less than clusters in a group. | |
611 | */ | |
612 | if (ffg->iff_chunksize > le16_to_cpu(cl->cl_cpg)) { | |
613 | status = -EINVAL; | |
614 | goto bail; | |
615 | } | |
616 | ||
617 | memset(&ffg->iff_ffs, 0, sizeof(struct ocfs2_info_freefrag_stats)); | |
618 | ||
619 | ffg->iff_ffs.ffs_min = ~0U; | |
620 | ffg->iff_ffs.ffs_clusters = | |
621 | le32_to_cpu(gb_dinode->id1.bitmap1.i_total); | |
622 | ffg->iff_ffs.ffs_free_clusters = ffg->iff_ffs.ffs_clusters - | |
623 | le32_to_cpu(gb_dinode->id1.bitmap1.i_used); | |
624 | ||
625 | chunks_in_group = le16_to_cpu(cl->cl_cpg) / ffg->iff_chunksize + 1; | |
626 | ||
627 | for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i++) { | |
628 | rec = &(cl->cl_recs[i]); | |
629 | status = ocfs2_info_freefrag_scan_chain(osb, gb_inode, | |
630 | gb_dinode, | |
631 | rec, ffg, | |
632 | chunks_in_group); | |
633 | if (status) | |
634 | goto bail; | |
635 | } | |
636 | ||
637 | if (ffg->iff_ffs.ffs_free_chunks_real) | |
638 | ffg->iff_ffs.ffs_avg = (ffg->iff_ffs.ffs_avg / | |
639 | ffg->iff_ffs.ffs_free_chunks_real); | |
640 | bail: | |
641 | if (unlock) | |
642 | ocfs2_inode_unlock(gb_inode, 0); | |
643 | ||
644 | if (gb_inode) | |
645 | mutex_unlock(&gb_inode->i_mutex); | |
646 | ||
647 | if (gb_inode) | |
648 | iput(gb_inode); | |
649 | ||
650 | brelse(bh); | |
651 | ||
652 | return status; | |
653 | } | |
654 | ||
655 | int ocfs2_info_handle_freefrag(struct inode *inode, | |
656 | struct ocfs2_info_request __user *req) | |
657 | { | |
658 | u64 blkno = -1; | |
659 | char namebuf[40]; | |
660 | int status = -EFAULT, type = GLOBAL_BITMAP_SYSTEM_INODE; | |
661 | ||
662 | struct ocfs2_info_freefrag *oiff; | |
663 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
664 | struct inode *gb_inode = NULL; | |
665 | ||
666 | oiff = kzalloc(sizeof(struct ocfs2_info_freefrag), GFP_KERNEL); | |
667 | if (!oiff) { | |
668 | status = -ENOMEM; | |
669 | mlog_errno(status); | |
87f0d5c8 | 670 | goto out_err; |
d24a10b9 TY |
671 | } |
672 | ||
673 | if (o2info_from_user(*oiff, req)) | |
674 | goto bail; | |
675 | /* | |
676 | * chunksize from userspace should be power of 2. | |
677 | */ | |
678 | if ((oiff->iff_chunksize & (oiff->iff_chunksize - 1)) || | |
679 | (!oiff->iff_chunksize)) { | |
680 | status = -EINVAL; | |
681 | goto bail; | |
682 | } | |
683 | ||
684 | if (o2info_coherent(&oiff->iff_req)) { | |
685 | gb_inode = ocfs2_get_system_file_inode(osb, type, | |
686 | OCFS2_INVALID_SLOT); | |
687 | if (!gb_inode) { | |
688 | mlog(ML_ERROR, "unable to get global_bitmap inode\n"); | |
689 | status = -EIO; | |
690 | goto bail; | |
691 | } | |
692 | } else { | |
693 | ocfs2_sprintf_system_inode_name(namebuf, sizeof(namebuf), type, | |
694 | OCFS2_INVALID_SLOT); | |
695 | status = ocfs2_lookup_ino_from_name(osb->sys_root_inode, | |
696 | namebuf, | |
697 | strlen(namebuf), | |
698 | &blkno); | |
699 | if (status < 0) { | |
700 | status = -ENOENT; | |
701 | goto bail; | |
702 | } | |
703 | } | |
704 | ||
705 | status = ocfs2_info_freefrag_scan_bitmap(osb, gb_inode, blkno, oiff); | |
706 | if (status < 0) | |
707 | goto bail; | |
708 | ||
709 | o2info_set_request_filled(&oiff->iff_req); | |
710 | ||
711 | if (o2info_to_user(*oiff, req)) | |
712 | goto bail; | |
713 | ||
714 | status = 0; | |
715 | bail: | |
716 | if (status) | |
717 | o2info_set_request_error(&oiff->iff_req, req); | |
718 | ||
719 | kfree(oiff); | |
87f0d5c8 | 720 | out_err: |
ddee5cdb TY |
721 | return status; |
722 | } | |
723 | ||
724 | int ocfs2_info_handle_unknown(struct inode *inode, | |
725 | struct ocfs2_info_request __user *req) | |
726 | { | |
727 | int status = -EFAULT; | |
728 | struct ocfs2_info_request oir; | |
729 | ||
730 | if (o2info_from_user(oir, req)) | |
731 | goto bail; | |
732 | ||
8aa1fa36 | 733 | o2info_clear_request_filled(&oir); |
ddee5cdb TY |
734 | |
735 | if (o2info_to_user(oir, req)) | |
736 | goto bail; | |
737 | ||
738 | status = 0; | |
739 | bail: | |
740 | if (status) | |
8aa1fa36 | 741 | o2info_set_request_error(&oir, req); |
ddee5cdb TY |
742 | |
743 | return status; | |
744 | } | |
745 | ||
746 | /* | |
747 | * Validate and distinguish OCFS2_IOC_INFO requests. | |
748 | * | |
749 | * - validate the magic number. | |
750 | * - distinguish different requests. | |
751 | * - validate size of different requests. | |
752 | */ | |
753 | int ocfs2_info_handle_request(struct inode *inode, | |
754 | struct ocfs2_info_request __user *req) | |
755 | { | |
756 | int status = -EFAULT; | |
757 | struct ocfs2_info_request oir; | |
758 | ||
759 | if (o2info_from_user(oir, req)) | |
760 | goto bail; | |
761 | ||
762 | status = -EINVAL; | |
763 | if (oir.ir_magic != OCFS2_INFO_MAGIC) | |
764 | goto bail; | |
765 | ||
766 | switch (oir.ir_code) { | |
767 | case OCFS2_INFO_BLOCKSIZE: | |
768 | if (oir.ir_size == sizeof(struct ocfs2_info_blocksize)) | |
769 | status = ocfs2_info_handle_blocksize(inode, req); | |
770 | break; | |
771 | case OCFS2_INFO_CLUSTERSIZE: | |
772 | if (oir.ir_size == sizeof(struct ocfs2_info_clustersize)) | |
773 | status = ocfs2_info_handle_clustersize(inode, req); | |
774 | break; | |
775 | case OCFS2_INFO_MAXSLOTS: | |
776 | if (oir.ir_size == sizeof(struct ocfs2_info_maxslots)) | |
777 | status = ocfs2_info_handle_maxslots(inode, req); | |
778 | break; | |
779 | case OCFS2_INFO_LABEL: | |
780 | if (oir.ir_size == sizeof(struct ocfs2_info_label)) | |
781 | status = ocfs2_info_handle_label(inode, req); | |
782 | break; | |
783 | case OCFS2_INFO_UUID: | |
784 | if (oir.ir_size == sizeof(struct ocfs2_info_uuid)) | |
785 | status = ocfs2_info_handle_uuid(inode, req); | |
786 | break; | |
787 | case OCFS2_INFO_FS_FEATURES: | |
788 | if (oir.ir_size == sizeof(struct ocfs2_info_fs_features)) | |
789 | status = ocfs2_info_handle_fs_features(inode, req); | |
790 | break; | |
791 | case OCFS2_INFO_JOURNAL_SIZE: | |
792 | if (oir.ir_size == sizeof(struct ocfs2_info_journal_size)) | |
793 | status = ocfs2_info_handle_journal_size(inode, req); | |
794 | break; | |
3e5db17d TY |
795 | case OCFS2_INFO_FREEINODE: |
796 | if (oir.ir_size == sizeof(struct ocfs2_info_freeinode)) | |
797 | status = ocfs2_info_handle_freeinode(inode, req); | |
798 | break; | |
d24a10b9 TY |
799 | case OCFS2_INFO_FREEFRAG: |
800 | if (oir.ir_size == sizeof(struct ocfs2_info_freefrag)) | |
801 | status = ocfs2_info_handle_freefrag(inode, req); | |
802 | break; | |
ddee5cdb TY |
803 | default: |
804 | status = ocfs2_info_handle_unknown(inode, req); | |
805 | break; | |
806 | } | |
807 | ||
808 | bail: | |
809 | return status; | |
810 | } | |
811 | ||
812 | int ocfs2_get_request_ptr(struct ocfs2_info *info, int idx, | |
813 | u64 *req_addr, int compat_flag) | |
814 | { | |
815 | int status = -EFAULT; | |
816 | u64 __user *bp = NULL; | |
817 | ||
818 | if (compat_flag) { | |
819 | #ifdef CONFIG_COMPAT | |
820 | /* | |
821 | * pointer bp stores the base address of a pointers array, | |
822 | * which collects all addresses of separate request. | |
823 | */ | |
824 | bp = (u64 __user *)(unsigned long)compat_ptr(info->oi_requests); | |
825 | #else | |
826 | BUG(); | |
827 | #endif | |
828 | } else | |
829 | bp = (u64 __user *)(unsigned long)(info->oi_requests); | |
830 | ||
831 | if (o2info_from_user(*req_addr, bp + idx)) | |
832 | goto bail; | |
833 | ||
834 | status = 0; | |
835 | bail: | |
836 | return status; | |
837 | } | |
838 | ||
839 | /* | |
840 | * OCFS2_IOC_INFO handles an array of requests passed from userspace. | |
841 | * | |
842 | * ocfs2_info_handle() recevies a large info aggregation, grab and | |
843 | * validate the request count from header, then break it into small | |
844 | * pieces, later specific handlers can handle them one by one. | |
845 | * | |
846 | * Idea here is to make each separate request small enough to ensure | |
847 | * a better backward&forward compatibility, since a small piece of | |
848 | * request will be less likely to be broken if disk layout get changed. | |
849 | */ | |
850 | int ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info, | |
851 | int compat_flag) | |
852 | { | |
853 | int i, status = 0; | |
854 | u64 req_addr; | |
855 | struct ocfs2_info_request __user *reqp; | |
856 | ||
857 | if ((info->oi_count > OCFS2_INFO_MAX_REQUEST) || | |
858 | (!info->oi_requests)) { | |
859 | status = -EINVAL; | |
860 | goto bail; | |
861 | } | |
862 | ||
863 | for (i = 0; i < info->oi_count; i++) { | |
864 | ||
865 | status = ocfs2_get_request_ptr(info, i, &req_addr, compat_flag); | |
866 | if (status) | |
867 | break; | |
868 | ||
869 | reqp = (struct ocfs2_info_request *)(unsigned long)req_addr; | |
870 | if (!reqp) { | |
871 | status = -EINVAL; | |
872 | goto bail; | |
873 | } | |
874 | ||
875 | status = ocfs2_info_handle_request(inode, reqp); | |
876 | if (status) | |
877 | break; | |
878 | } | |
879 | ||
880 | bail: | |
881 | return status; | |
882 | } | |
883 | ||
c9ec1488 | 884 | long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ca4d147e | 885 | { |
c9ec1488 | 886 | struct inode *inode = filp->f_path.dentry->d_inode; |
ca4d147e | 887 | unsigned int flags; |
d659072f | 888 | int new_clusters; |
ca4d147e | 889 | int status; |
b2580103 | 890 | struct ocfs2_space_resv sr; |
7909f2bf | 891 | struct ocfs2_new_group_input input; |
bd50873d TM |
892 | struct reflink_arguments args; |
893 | const char *old_path, *new_path; | |
894 | bool preserve; | |
ddee5cdb | 895 | struct ocfs2_info info; |
ca4d147e HP |
896 | |
897 | switch (cmd) { | |
898 | case OCFS2_IOC_GETFLAGS: | |
899 | status = ocfs2_get_inode_attr(inode, &flags); | |
900 | if (status < 0) | |
901 | return status; | |
902 | ||
903 | flags &= OCFS2_FL_VISIBLE; | |
904 | return put_user(flags, (int __user *) arg); | |
905 | case OCFS2_IOC_SETFLAGS: | |
906 | if (get_user(flags, (int __user *) arg)) | |
907 | return -EFAULT; | |
908 | ||
a561be71 | 909 | status = mnt_want_write_file(filp); |
42a74f20 DH |
910 | if (status) |
911 | return status; | |
912 | status = ocfs2_set_inode_attr(inode, flags, | |
ca4d147e | 913 | OCFS2_FL_MODIFIABLE); |
2a79f17e | 914 | mnt_drop_write_file(filp); |
42a74f20 | 915 | return status; |
b2580103 MF |
916 | case OCFS2_IOC_RESVSP: |
917 | case OCFS2_IOC_RESVSP64: | |
918 | case OCFS2_IOC_UNRESVSP: | |
919 | case OCFS2_IOC_UNRESVSP64: | |
920 | if (copy_from_user(&sr, (int __user *) arg, sizeof(sr))) | |
921 | return -EFAULT; | |
922 | ||
923 | return ocfs2_change_file_space(filp, cmd, &sr); | |
d659072f | 924 | case OCFS2_IOC_GROUP_EXTEND: |
0957f007 MF |
925 | if (!capable(CAP_SYS_RESOURCE)) |
926 | return -EPERM; | |
927 | ||
d659072f TM |
928 | if (get_user(new_clusters, (int __user *)arg)) |
929 | return -EFAULT; | |
930 | ||
931 | return ocfs2_group_extend(inode, new_clusters); | |
7909f2bf TM |
932 | case OCFS2_IOC_GROUP_ADD: |
933 | case OCFS2_IOC_GROUP_ADD64: | |
0957f007 MF |
934 | if (!capable(CAP_SYS_RESOURCE)) |
935 | return -EPERM; | |
936 | ||
7909f2bf TM |
937 | if (copy_from_user(&input, (int __user *) arg, sizeof(input))) |
938 | return -EFAULT; | |
939 | ||
940 | return ocfs2_group_add(inode, &input); | |
bd50873d TM |
941 | case OCFS2_IOC_REFLINK: |
942 | if (copy_from_user(&args, (struct reflink_arguments *)arg, | |
943 | sizeof(args))) | |
944 | return -EFAULT; | |
945 | old_path = (const char *)(unsigned long)args.old_path; | |
946 | new_path = (const char *)(unsigned long)args.new_path; | |
947 | preserve = (args.preserve != 0); | |
948 | ||
949 | return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve); | |
ddee5cdb TY |
950 | case OCFS2_IOC_INFO: |
951 | if (copy_from_user(&info, (struct ocfs2_info __user *)arg, | |
952 | sizeof(struct ocfs2_info))) | |
953 | return -EFAULT; | |
954 | ||
955 | return ocfs2_info_handle(inode, &info, 0); | |
55e67872 TM |
956 | case FITRIM: |
957 | { | |
958 | struct super_block *sb = inode->i_sb; | |
959 | struct fstrim_range range; | |
960 | int ret = 0; | |
961 | ||
962 | if (!capable(CAP_SYS_ADMIN)) | |
963 | return -EPERM; | |
964 | ||
965 | if (copy_from_user(&range, (struct fstrim_range *)arg, | |
966 | sizeof(range))) | |
967 | return -EFAULT; | |
968 | ||
969 | ret = ocfs2_trim_fs(sb, &range); | |
970 | if (ret < 0) | |
971 | return ret; | |
972 | ||
973 | if (copy_to_user((struct fstrim_range *)arg, &range, | |
974 | sizeof(range))) | |
975 | return -EFAULT; | |
976 | ||
977 | return 0; | |
978 | } | |
53069d4e TY |
979 | case OCFS2_IOC_MOVE_EXT: |
980 | return ocfs2_ioctl_move_extents(filp, (void __user *)arg); | |
ca4d147e HP |
981 | default: |
982 | return -ENOTTY; | |
983 | } | |
984 | } | |
985 | ||
586d232b MF |
986 | #ifdef CONFIG_COMPAT |
987 | long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
988 | { | |
34e6c59a TM |
989 | bool preserve; |
990 | struct reflink_arguments args; | |
991 | struct inode *inode = file->f_path.dentry->d_inode; | |
ddee5cdb | 992 | struct ocfs2_info info; |
34e6c59a | 993 | |
586d232b MF |
994 | switch (cmd) { |
995 | case OCFS2_IOC32_GETFLAGS: | |
996 | cmd = OCFS2_IOC_GETFLAGS; | |
997 | break; | |
998 | case OCFS2_IOC32_SETFLAGS: | |
999 | cmd = OCFS2_IOC_SETFLAGS; | |
1000 | break; | |
b2580103 MF |
1001 | case OCFS2_IOC_RESVSP: |
1002 | case OCFS2_IOC_RESVSP64: | |
1003 | case OCFS2_IOC_UNRESVSP: | |
1004 | case OCFS2_IOC_UNRESVSP64: | |
d659072f | 1005 | case OCFS2_IOC_GROUP_EXTEND: |
7909f2bf TM |
1006 | case OCFS2_IOC_GROUP_ADD: |
1007 | case OCFS2_IOC_GROUP_ADD64: | |
55e67872 | 1008 | case FITRIM: |
b2580103 | 1009 | break; |
34e6c59a TM |
1010 | case OCFS2_IOC_REFLINK: |
1011 | if (copy_from_user(&args, (struct reflink_arguments *)arg, | |
1012 | sizeof(args))) | |
1013 | return -EFAULT; | |
1014 | preserve = (args.preserve != 0); | |
1015 | ||
1016 | return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path), | |
1017 | compat_ptr(args.new_path), preserve); | |
ddee5cdb TY |
1018 | case OCFS2_IOC_INFO: |
1019 | if (copy_from_user(&info, (struct ocfs2_info __user *)arg, | |
1020 | sizeof(struct ocfs2_info))) | |
1021 | return -EFAULT; | |
1022 | ||
1023 | return ocfs2_info_handle(inode, &info, 1); | |
53069d4e TY |
1024 | case OCFS2_IOC_MOVE_EXT: |
1025 | break; | |
586d232b MF |
1026 | default: |
1027 | return -ENOIOCTLCMD; | |
1028 | } | |
1029 | ||
c9ec1488 | 1030 | return ocfs2_ioctl(file, cmd, arg); |
586d232b MF |
1031 | } |
1032 | #endif |